What is PosBand?

PosBand doesn't add such radical changes as wilderness or multiple dungeons;
instead, it concentrates on two main features:

Possessor class. Possessor cannot use any magic or prayers; instead, he can
change his body, reincarnating in bodies of dead monsters, and using their
powers. For example, if a possessor incarnates into a blue dragon, he will
have bonuses in strength and constitution, but penalties in other stats;
resistance or even immunity to lightning, depending on dragon age; greatly
increased innate armor class; ability to breathe lightning in various forms.
Also, as a dragon, he will be unable to use traditional weapons and most of
types of armor. Instead, a dragon body has six ring slots, and innate
claw/bite attack. The possessor class was first introduced in ToME.

Monster races. This means that you will be a dragon, elemental, lich or
whatever you like from the very beginning. Your body will be able to evolve
into more powerful forms. This feature in different forms is available in many
variants, for instance, DrAngband (dragons) and EyAngband (angels and demons).